Mainstay ML-PF mortar contains 100% pure fused calcium aluminate aggregates specifically designed for the rehabilitation of deteriorated concrete and brick structures in wastewater environments subject to biologically induced hydrogen sulfide (H2S) corrosion with a pH of 1 or higher, such as manholes and lift stations.

Mainstay ML-PF product data PDF Download our product detail sheet (34 KB, opens in separate window).

Product Overview

Mortar Type

Calcium aluminate cement mortar with pure fused calcium aluminate aggregates


65 pound bag; special packaging available

Mix Water

Up to 1 gallon per bag


0.48 cubic feet per bag when mixed correctly

Compressive Strength

>16,000 pounds per square inch in 28 days (ASTM C-109)


0% after 28 days at 90% relative humidity (ASTM C-490)

Application Equipment

Contact us for information on the proper equipment to apply this product.